Car-axle box



(No Model.)

H. M. JOHNSON. GAR AXLE BOX.

No; 408,880. I Patented Aug. 13., 1889.

UNITED STATES PATENT OEEICE.

HARLEY M. JOHNSON, OF CHICAGO, ILLINOIS.

CAR-AXLE BOX.

SPECIFICATION forming part of Letters Patent No. 408,880, dated August13, 1889.

Application filed December 10, 1888. Serial No. 293,203- (No model.)

To all whom, it may. concern:

Be it known that I, HARLEY M. JOHNSON, residing at Chicago, in thecounty of Cook and State of Illinois, and a citizen of the UnitedStates, have invented a new and useful Improvementin Car-Axle Boxes, ofwhich the following is a specification, reference being had to theaccompanying drawings, in which Figure 1 is a vertical cross-section atline 1 of Fig. 2, looking to the left. Fig. 2 is a longitudinal section,some parts being in elevation. Fig. 3 is a detail showing in elevationthe end-thrust rollers and the ring within which they are mounted. Fig.4 represents a modification and is enlarged.

My improvement relates to that class of caraxle boxes which are designedto be used without lubrication.

The leading objects of my invention are to provide improved devices forreducing the friction, to provide improved devices which permittransverse motion, and to provide improved devices for .receiving theend-thrust of the axle, which I accomplish as illustrated in thedrawings, and hereinafter described.

Those things which I claim as new will be pointed out in the claims.

In the drawings, A represents an axle.

B is a metal ring through which the axle A passes.

a are studs projecting from the inside of the ring B, of which, asshown, there are seven.

O is another ring similar to B, except that the central opening is alittle larger than the opening in B. This ring 0 is provided with studsZ), corresponding with the studs a.

c are small rollers which surround the studs a and l). i

1) are friction-rollers, the ends of which are recessed to receive thestuds a b and the rollers c.

(l are friction-washers which receive a part of the friction, whichotherwise would come wholly upon the rollers D and c and the rings B andO.

E are tie-rods which hold the rings B Q in place.

F is a journahbearing which rests upon a part of the rollers I).

G is a casing; it is provided with lugs or ears 6.

H is a cap or cover secured to the casing by means of bolts, which passthrough the cap and through the ears 6.

In the top of the bearing F there are two transverse recesses orchannels f, the side walls of which are angular. The bot-tom g of eachof these recesses is circular. casing G is also provided with tworecesses or channels 71., similar to the recesses f, and the tops 1' ofthese recesses are also circular.

I are two rectangular pieces of metal located in the recesses orchannels f h, and in contact with the bottoms and tops of the recessesor channels. The bottoms of the recesses or channels f are made uponcircles the diameters of which are somewhat greater than the longestpart of the pieces I, (seen in Fig. 2,) and the tops i of the channels hare formed in the same manner. By using the pieces I, in connection withthe recesses constructed as described, if the parts have any transversemovement the tendency will be to return to their normal position.

j is a metal ring, in which are secured short shafts 7a, 011 whichrollers Z are placed.

7Tb is a shaft located in a long bearing in the cap or cover H, andconnected at its inner end with the short shafts 7a.

In use the axle A is liable'to have some end movement, and if the end ofthe axle comes in contact with these rollers Z there will be but littlefriction. By providing the ends of the roller D with recesses and usingthe studs a b and the rollers 0, located in the ends of the rollers D,as described, the friction will be materially reduced.

. In Fig. 4 I have shown a modification in which the bottoms of therecesses f are flat, and the tops of the recesses h are also flat, andthe tops and bottoms of the pieces I are curved, the result in operationof these parts being precisely the same as before described.

The tie-rods E are triangular instead of round, as usual, and therebythey are greatly strengthened and better adapted to hold ,the ringswhich they connect permanently in their proper position.

The journal-bearing F only extends over a part of the rollers,terminating a little above the center of the rings 13 O, below whichpoint there is no boxing or bearing, so that any dust or dirt whichaccumulates can fall to the Th e bottom of the casing and will not beretained among the rollers. This is a desirable feature of construction.

The rings B C are of such size that the journal-bearing F is locatedbetween them, and they serve the purpose of holding such hearing inposition.

Vhat I claim as new, and desire to secure by Letters Patent, is asfollows:

1. The rollers D, having recesses in their ends, in combination with therings B 0, provided with studs a I), and the rollers 0, substantially asand for the purposes specified.

2. The rollers D, having; recesses in their ends, in combination withthe rings B O,pro-

- \ided with studs ab, rollers c, and washers d,

substantially as and for the purposes specified.

A journal-bearing, as F, provided with recesses or channels f, incombination with a casing, as G, provided With recesses or chan nels 7e,and rectangular pieces, as I, located in said channels, and havingcircular bearings, which permit a rocking movement of said pieces I,whereby if there be any transverse movement of the bearingF the tendencywill be to return it to the normal position, substantially as and forthe purposes specified.

4. In a journal-box, a casing, as G, and a cover, as H, in combinationwith a ring j, shafts 7t, rollers Z, and shaft m, substantially as andfor the purposes specified.

HARLEY M. .TOIIN SON.

Vitnesses:

ALBERT I1. ADAMS, HARRY T. Jones.

